Yamaha R-N402, Service Manual

Page: 20 / 83

20
R-N402/R-N402D
R-N402/R-N402D
●
Starting Self-Diagnostic Function
While pressing the “ PRESET ” and “ BASS + ” keys, press the “
z
” ( P ower) key to turn on the power, and release those 2
keys.
T he self-diagnostic function mode is activated.
Keys of this unit
“ ” (Power) key
●
Starting Self-Diagnostic Function in the protection cancel mode
If the protection function works and causes hindrance to troubleshooting, cancel the protection function by the procedure
below, and it will be possible to enter the self-diagnostic function mode. ( T he protection functions other than the excess
current detect function will be disabled.)
While pressing the
“
PRESET
”
and
“
BASS +
”
keys, press the
“
z
”
( P ower) key to turn on the power and keep pressing
those 2 keys for 3 seconds or longer.
T he self-diagnostic function mode is activated with the protection functions disabled.
In this mode, the
“
S L EEP
”
segment of the FL display flashes to indicate that the mode is self-diagnostic function mode with
the protection functions disabled.
CAUTION:
U sing this unit with the protection function disabled may cause further damage to this unit. U se special care for this point
when using this mode.
●
Canceling Self-Diagnostic Function
1. B efore canceling self-diagnostic function, execute setting for “ S 1. F A C T O RY PRESET ” menu. (Memory initialization
inhibited or Memory initialized).
* In order to keep the user memory preserved, be sure to select PRESET I NH I B I T (Memory initialization inhibited).
2. P ress the
“
z
”
( P ower) key to turn off the power.
While pressing these keys, turn on the power.
Front view